import fetch from 'dva/fetch';
import { notification } from 'antd';
import router from 'umi/router';
import hash from 'hash.js';
import mdf from 'react-native-md5';
import { isAntdPro } from './utils';

const codeMessage = {
  200: '服务器成功返回请求的数据。',
  201: '新建或修改数据成功。',
  202: '一个请求已经进入后台排队（异步任务）。',
  204: '删除数据成功。',
  400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
  401: '用户没有权限（令牌、用户名、密码错误）。',
  403: '用户得到授权，但是访问是被禁止的。',
  404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
  406: '请求的格式不可得。',
  410: '请求的资源被永久删除，且不会再得到的。',
  422: '当创建一个对象时，发生一个验证错误。',
  500: '服务器发生错误，请检查服务器。',
  502: '网关错误。',
  503: '服务不可用，服务器暂时过载或维护。',
  504: '网关超时。',
};

// const checkStatus = response => {
//   // console.log("response",response)
//   if (response.status >= 200 && response.status < 300) {
//     return response;
//   }

//   const errortext = codeMessage[response.status] || response.statusText;
//   notification.error({
//     message: `请求错误 ${response.status}: ${response.url}`,
//     description: errortext,
//   });

//   const error = new Error(errortext);
//   error.name = response.status;
//   error.response = response;
//   throw error;
// };

// const cachedSave = (response, hashcode) => {
//   /**
//    * Clone a response data and store it in sessionStorage
//    * Does not support data other than json, Cache only json
//    */
//   const contentType = response.headers.get('Content-Type');
//   if (contentType && contentType.match(/application\/json/i)) {
//     // All data is saved as text
//     response
//       .clone()
//       .text()
//       .then(content => {
//         sessionStorage.setItem(hashcode, content);
//         sessionStorage.setItem(`${hashcode}:timestamp`, Date.now());
//       });
//   }
//   return response;
// };

// const returnHeaders = () => {
//   let CHECK_HEADERS_OPITON = {};
//   if(sessionStorage.getItem('LOGIN_INFO')){
//     const resultArray = [
//       `${JSON.parse(sessionStorage.getItem('LOGIN_INFO')).stock_code}`,
//       `${JSON.parse(sessionStorage.getItem('LOGIN_INFO')).user_id}`,
//       `web`,
//       `${mdf.hex_md5(navigator.userAgent)}`,
//       `${JSON.parse(sessionStorage.getItem('LOGIN_INFO')).sign}`]
//       .sort()
//       .toString()
//       .replace(/,/g,"&")

//     // CHECK_HEADERS_OPITON = {
//       newOptions.headers = {
//       'USER-ID': JSON.parse(sessionStorage.getItem('LOGIN_INFO')).user_id,
//       'TOKEN': JSON.parse(sessionStorage.getItem("LOGIN_INFO")).token,
//       'TIMESTAMP': Date.parse(new Date()).toString().substr(0, 10),
//       'SOURCE': 'web',
//       'DEVICE-ID': mdf.hex_md5(navigator.userAgent),
//       'SIGN-RESULT': mdf.hex_hmac_md5(JSON.parse(sessionStorage.getItem('LOGIN_INFO')).sign,resultArray),
//     }
//   }
//   // return CHECK_HEADERS_OPITON
// }

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [option] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export default function request(url, option) {
  function isASCII(str) {
    return /^[\x00-\x7F]*$/.test(str);
  }

  Object.keys(option).map(function(key, index) {
    // if (!isASCII(option[key])) {
    if (key === 'keyword') {
      // The following line is not working!!!! Never use it, a waste of time.
      // const base64Str = encodeURIComponent(btoa(unescape(encodeURIComponent(option[key]))));
      const base64Str = btoa(unescape(encodeURIComponent(option[key])));
      url = url.replace(key + '=' + option[key], key + '=' + base64Str).replace('+', '%2B');
      option[key] = base64Str;
      // TODO: How do the server side know that a string is base64 encoded? Two possible approches
      // 1. Consider add "base64:" prefix to the value string
      // 2. Go through every possible api to find which field needs to be base64, then consider the submitted value must be base64 encoded.
    }
  });

  // console.log('option', option);
  const options = {
    // expirys: isAntdPro(),
    // ...CHECK_HEADERS_OPITON,
    ...option,
  };

  // console.log("_options",_options);
  /**
   * Produce fingerprints based on url and parameters
   * Maybe url has the same parameters
   */
  // const fingerprint = url + (options.body ? JSON.stringify(options.body) : '');
  // const hashcode = hash
  //   .sha256()
  //   .update(fingerprint)
  //   .digest('hex');
  // console.log("hashcode",hashcode)
  // const defaultOptions = {
  //   // credentials: 'include',
  // };
  // console.log("options",options);
  // console.log("options",Object.values(options).filter(function(obj) { console.log("obj",obj); return obj !=="GET" }));
  // console.log("-------",!options.body)
  const newOptions = { ...options };
  const _options = options;
  delete _options['method'];
  let header_arr = [];
  let options_arr = [];

  if (sessionStorage.getItem('LOGIN_INFO')) {
    header_arr = [
      // `${JSON.parse(sessionStorage.getItem('LOGIN_INFO')).stock_code}`,
      `${JSON.parse(sessionStorage.getItem('LOGIN_INFO')).user_id}`,
      `web`,
      `${mdf.hex_md5(navigator.userAgent)}`,
      `${JSON.parse(sessionStorage.getItem('LOGIN_INFO')).sign}`,
    ];
  }
  // console.log("header_arr",header_arr);

  // console.log("newOptions",newOptions);
  if (newOptions.method && newOptions.method === 'POST') {
    options_arr = Object.values(_options.body);
    // console.log("options_arr",options_arr);
  } else {
    // console.log("method",newOptions.method)
    options_arr = Object.values(_options);
    // console.log("options_arr",options_arr);
  }

  const all_arr = options_arr.concat(header_arr);
  all_arr.sort();
  let arr_mdr = '';
  for (let i = 0; i < all_arr.length; i++) {
    if (i == all_arr.length - 1) {
      arr_mdr += all_arr[i];
    } else {
      arr_mdr += all_arr[i] + '&';
    }
  }

  // console.log('arr_mdr', arr_mdr);

  newOptions.headers = {
    TOKEN: JSON.parse(sessionStorage.getItem('LOGIN_INFO')).token,
    TIMESTAMP: Date.parse(new Date())
      .toString()
      .substr(0, 10),
    SOURCE: 'web',
    'DEVICE-ID': mdf.hex_md5(navigator.userAgent),
    'SIGN-RESULT': mdf.hex_hmac_md5(
      JSON.parse(sessionStorage.getItem('LOGIN_INFO')).sign,
      encodeURIComponent(arr_mdr)
      // all_arr.sort()
      // .changeString()
      // .toString()
      // .replace(/,/g, '&')
    ),
  };
  // console.log('数组：', all_arr.sort())
  // console.log('加密前：', all_arr.sort().toString().replace(/,/g, '&'))
  // console.log('加密结果：', mdf.hex_hmac_md5( JSON.parse(sessionStorage.getItem('LOGIN_INFO')).sign, encodeURIComponent(all_arr.sort().toString().replace(/,/g, '&'))),);

  if (
    newOptions.method === 'POST' ||
    newOptions.method === 'PUT' ||
    newOptions.method === 'DELETE'
  ) {
    if (!(newOptions.body instanceof FormData)) {
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'application/json; charset=utf-8',
        // 'Content-Type': 'application/x-www-form-urlencoded',
        ...newOptions.headers,
      };
      // console.log("Method is",newOptions.method)
      // newOptions.body = newOptions.body;
      newOptions.body = JSON.stringify(newOptions.body);
      // console.log('NO FormData', newOptions.body);
    } else {
      // newOptions.body is FormData
      newOptions.headers = {
        Accept: 'application/json',
        ...newOptions.headers,
      };
      console.log('FormData', newOptions);
    }
  }

  return (
    fetch(url, newOptions)
      .then(response => {
        // console.log("response-",response);
        // console.log("fetch-newOptions",newOptions)

        if (newOptions.methods === 'DELETE' || response.status === 204) {
          return response.text();
        }
        return response.json();
      })
      // .then(checkStatus)
      // .then(response => cachedSave(response, hashcode))
      .then(body => {
        // console.log("body",body.code)
        // DELETE and 204 do not return data by default
        // using .json will report an error.

        if (body.code !== undefined && body.code > 0) {
          throw {
            status: body.code,
            message: body.message,
          };
        } else if (body.flag !== undefined && !body.flag) {
          throw {
            status: body.flag,
            message: body.message,
          };
        }

        return body;
      })
      .catch(e => {
        console.log('请求错误:', e);
        const status = e.status;

        if (status === 1120 || status === 1121) {
          console.log(e.message);
          window.g_app._store.dispatch({
            type: 'login/logout',
          });
          return;
        }
        // environment should not be used
        if (status === 403) {
          router.push('/exception/403');
          return;
        }
        if (status <= 504 && status >= 500) {
          router.push('/exception/500');
          return;
        }
        if (status >= 404 && status < 422) {
          router.push('/exception/404');
        }

        // if (status === true) {
        //   console.log(e.message);
        //   window.g_app._store.dispatch({
        //     type: 'login/logout',
        //   });
        //   return;
        // }

        // if (status === 401) {
        //   // @HACK
        //   /* eslint-disable no-underscore-dangle */
        //   window.g_app._store.dispatch({
        //     type: 'login/logout',
        //   });
        //   return;
        // }
      })
  );
}
